Improvement in door-bells



H. A. DIERKES.

DOOR-BELLS.

Pate nte'd June 6. 1876.

lNVENTUR= Q/ATTEST (IL/W d am z NFEIERS, PHOTO-UTHDGRAFHER, WASHINGTON. D. C.

HENRY A. DIERKES, on NEW YORK, N. Y.

IMPROVEMENT IN DOOR-BELLS.

Specification forming part of Letters Patent No. 178,421, dated June 6, 1876 application filed April 18, 1876.

To all whom it may concern Be it known that I, HENRY A. DIERKES, of the city, county, and State of New York, have invented certain Improvements in Door Calls or Bells, of which the following isa specification This invention relates to, and consists in, a combination of a hammer-arm, to which a hammer is rigidly affixed, a gong or bell arranged to be struck by the said hammer, and an operating-lever arranged to act directly upon the free end of the said hamhier -arm, or upon a trip attached thereto, the pull of the lever being upon the outside of the door, and the striking mechanism within the circumference of the bell.

In my Letters Patentfor a door-bell, dated February 29, 1876, No. 174,210, I have shown a spring-follower, arranged to be actuated directly by a lever, said follower actuating, in its turn, a loosely-suspended hammer.

In this present application the spring-follower is dispensed with, and the lever arranged to act directly upon the free end of a hammer-arm, which simplifies the device, and lessens the number of pivot-points.

In the drawings, Figure l is an elevation of the base-plate, upon which the operative parts are mounted. Fig. 2 is a vertical section of the bell as a whole, taken in the plane of the line 00 w, Fig.1. Fig. 3 is a modification of my device, showing how the trip may be dispensed with.

A is a base-plate, upon which is mounted an ordinary gong or hell, B. The base-plate may be secured to the inner face of a door, 0. I) is a hammer rigidly aflixed to, or forming a part of, a hammer-arm, E, which is pivoted to the base-plate at a. It may be provided at its free end with a trip or pawl, b, to form an escapement.

A spring, F, acts upon the hammer-arm, and keeps it habitually pressed down against a suitable stop.

A lever, G, of any desired form, is pivoted in any convenient manner either to a door, or to a suitable face-plate. This lever is provided with a suitable spring, H, which keeps it habitually drawn down, the end of the lever resting immediately below the trip or free end of the hammer-arm.

The operation is as follows When the knob- I is pulled fromthe outside of the door, the inner end of the lever Gr engages and lifts the imity to the inner face of the bell, a little elasticity in the part connectingit with the hammeraarm permits the momentum to carry it on to the bell, which it strikes a smart blow. When the knob I is released the spring H will draw down thelever, the trip giving way to allow it to resume its former position.

In Fig. 3 I have shown a hammer-arm unprovided with a trip. In this construction I cut away the slot in the base-plate at c, and the ordinary looseness of the lever G in its hearings will permit it to move sidewise, and wipe into its proper place below the hammer-arm, as shown.

I am aware that none of the elements going to make up my invention are new in themselves, as all have been used before in different combinations; but the arrangement of these is more or less costly and complex; whereas, in my present invention they are few in number, and arranged in the simplest manner possible toproduce a good result.

I claim I The combination of the hammer-arm E, to which is rigidly attached a hammer, D, with alever, G,arranged to operate direetlyupon the trip I), or free end of the hammer-arm, when the lever or pull is arranged to be operated from the outside,and the inner end of the lever, together with the striking mechanism, is inclosed within the circumference of the bell, as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HENRY A. DIERKES. Witnesses:

HENRY GoNNErT, ARTHUR G. FRASER. 

